The Dark Age: The Ancient Future Trilogy, Book 1

Late one evening, en route to visit a relative, an accident leaves Tory - the attractive, twenty-something daughter of a prominent history professor - stranded near a ring of stones in Britain. Tory resolves to spend the night at the stone circle and seek help in the morning... But across the vortex of time and space, she is taken back to the Dark Age.

An Echo In Time: Ancient Future Trilogy, Book 2

The narrow stairway inside the mountain led to a door that opened into a huge marble plateau. Upon this stood a stone circle of nine of the largest hunks of polished crystal Tory had ever seen. A turbulent cloud erupted overhead, its core alive with electromagnetic activity. For 20 years the kingdoms of Prydyn, Dumnonia and Dalriada have prospered in peace under the guidance of their High King, Maelgwn of Gwynedd, and his good Queen, Tory.

Masters of Reality: The Ancient Future, Book 3: The Gathering

The extraordinary and best-selling journeys of one woman throughout time... An enormous vortex spiralled above the Earth, out beyond the orbit of the moon. Its centre was expanding to form a huge glowing corridor through the fabric of space. This brilliant mass shot forth thousands of glowing balls of light that proceeded to descend toward our planet.